Forest History Center: open Saturdays 10 a.m.-4 p.m., Sundays noon-4 p.m. Labor Day through June 15

Folsom House: closes the second weekend in October

Fort Ridgely: open Saturdays and Sundays 10 a.m.-5 p.m. starting Labor Day, closes the third weekend in October

Harkin Store: open Saturday and Sundays 10 a.m.-5 p.m. starting Labor Day, closes the third weekend in October

Historic Forestville: open Saturdays 10 a.m.-5 p.m. in September and October

Historic Fort Snelling: open Saturdays 10 a.m.-5 p.m. in September and October

Jeffers Petroglyphs: open Saturdays 10 a.m.-5 p.m. in September

Lower Sioux Agency: closes the first weekend of October

Marine Mill: closes the end of October

Mille Lacs Indian Museum and Trading Post: open Wednesday through Saturday11 a.m.-4 p.m. in September and October. Trading Post open year-round

Minnehaha Depot: closes Labor Day

North West Company Fur Post: open Saturdays 10 a.m.-5 p.m. and Sundays noon-5 p.m. in September. Groups tours available September through May

Oliver Kelley Farm: open Saturdays 10 a.m.-5 p.m. and Sundaynoon-5 p.m. in September and October

Split Rock Lighthouse: open daily 10 p.m.-6 p.m. through the third weekend in October. Visitor Center and grounds open Thursdays through Mondays 11 a.m.-4 p.m. the third weekend in October throughMay 15